This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

Please enable Javascript to watch this video

COLUMBUS-The suspect in the Ohio State University attack ran into a group of pedestrians on a street corner with his vehicle before using a weapon to cut several people, OSU President Dr. Michael Drake said. The assailant used a butcher knife, OSU Police Chief Craig Stone said.

OSU student Jacob Bower, 20, said he saw a man pull a knife outside between the Koffolt Laboratories and Watts Hall.

"He pulled a large knife and started chasing people around, trying to attack them," Bower told CNN. He said it appeared to be a large kitchen knife.

"Luckily there were so many people, he couldn't focus on one target. I didn't see anyone get stabbed, but I saw the police officer take down the stabber. He waited till everyone was clear, and the stabber clearly wasn't stopping. (It) took three shots to take him down. (The) stabber had a crazy look in his eyes."

When asked if the suspect yelled or said anything during the attack, Bower told CNN: "He was completely silent. Which was very creepy. Not even when he was shot (by police)."

Watts Hall is the university's materials science and engineering building.

OSU senior Anthony Falzarano, 22, said he was in class at the time.

"We heard a lot of sirens. I was in class and everyone got a text message at the same time for the emergency alert," he told CNN during the lockdown. "Someone said they heard popping right before we got the alert, but I didn't hear it. We are in a shelter-in-place right now in the building next door. "

"The officers are putting on Kevlar vests and have big weapons," he said. "I can't see anyone going inside the building -- there's just so many cops here."

Some students piled chairs against a door to barricade themselves.

"I'm safe in a barricaded room," Harrison Roth tweeted. "If you're on campus, get in a room and stay safe."

Ohio State University's main campus in Columbus is one of the largest in the United States. The university has more than 65,000 students enrolled across the state.

Students had just returned to class Monday after the Thanksgiving break -- and after the OSU football team's big win Saturday over the school's biggest rival, University of Michigan.